Examine the following expressions:
A(x)=7, B(x)=2x+5, C(x)=x2−4x+4, D(x)=4x3−1.5x, E(x)=3x−2+1.
Answer the questions below:
(i) Write the letters of all expressions that are polynomials.
(ii) For each polynomial identified in part (i), state its degree.
(iii) For each polynomial identified in part (i), classify it as a monomial, binomial, or trinomial.